Chains and heterogens:
PDB Chain Sequences:
>1gbeA (A:) anivggieysinnaslcsvgfsvtrgatkgfvtaghcgtvnatariggavvgtfaarvfp gndrawvsltsaqtllprvangssfvtvrgsteaavgaavcrsgrttgyqcgtitaknvt anyaegavrgltqgnacagrgdsggswitsagqaqgvmsglnvqsngnncgipasqrssl ferlqpilsqyglslvtg